OptiFit® Technology OptiFit Hosel allows golfers to set the face angle in either Open, Square or Closed positions to optimize ball flight * Aggressive VFT® Technology Precision shaping of the face thickness in each club increases the size of the sweet spot Generates higher ball speeds for longer distance * Stainless Steel Construction Traditional shape with a full length hosel appeals to a wide range of players Heat treated for enhanced strength, enabling the aggressive VFT pattern Produces a resonant sound at impact * This product comes with a headcover with an interchangeable tab to indicate the respective club number (3, 4, 5, 7, 9 or X)